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Seasonal and spatial variations of heavy metalsin surface sediments collected from the BaoxiangRiver in the Dianchi Watershed, China
Xiao, DD(Xiao, Dongdong)1; Shi, ZT(Shi, Zhengtao)1; Wu, F(Wu, Feng)2; Su, B(Su,Bing)1; Feng, ZB(Feng, Zebo)1; Shi, Zhengtao
2018-02-13
发表期刊Human and Ecological Risk Assessment: An InternationalJournal
卷号24期号:7页码:1916-1929
摘要To explore potential ecological hazards due to heavy metals in the
Dianchi Lake Watershed, a three-stage European Community Bureau of
Reference (BCR) sequential extraction procedure was applied to examine
the spatial distributions and relative speciation ratios of Zn, Cu, Ni, Pb,
and Cr in Baoxiang River sediments during wet and dry seasons. The
metal species have similar spatial variations during different seasons. In
the upstream reaches of the Baoxiang River, heavy metals reside
primarily in the non-extractable residual fraction (72
90%). In the
midstream, the residual fraction (35
89%) remains dominant, but the
extractable fraction increases, featuring especially notable increases in
the reducible fraction (5
40%). Downstream, the Cu, Ni, Pb, and Cr
residual fractions remain high (46
80%) and the extractable fractions
increase rapidly; the Zn extractable fraction is quite high (65.5%).
Anthropogenic sources drive changes in heavy metal speciation.
Changes in the river environment, such as pH and oxidation-reduction
potential, also affect speciation. The reducible fraction of heavy metals
in Baoxiang River sediments is most sensitive to pH. Potential ecological
risk assessments for these
five elements indicate that risks from Zn and
Pb are mild to moderate in the middle and lower reaches of the river.

关键词Sediments Heavy Metal Speciation Ecological Risk Assessment Baoxiang River Dianchi Lake
收录类别SCI
所属项目编号2014003
语种英语
项目资助者the Water Conservancy Science and Technology project of Yunnan Provincial Water Resources Department ; the Water Conservancy Science and Technology project of Yunnan Provincial Water Resources Department
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/5249
专题粉尘与环境研究室
通讯作者Shi, Zhengtao
作者单位1.School of Tourism and Geographical Science, Yunnan Normal University, Kunming, Yunnan, China
2.KeyLaboratory of Aerosol Chemistry and Physics, State Key Laboratory of Loess and Quaternary Geology, Instituteof Earth Environment, Chinese Academy of Sciences, Xian, China
推荐引用方式
GB/T 7714
Xiao, DD,Shi, ZT,Wu, F,et al. Seasonal and spatial variations of heavy metalsin surface sediments collected from the BaoxiangRiver in the Dianchi Watershed, China[J]. Human and Ecological Risk Assessment: An InternationalJournal,2018,24(7):1916-1929.
APA Xiao, DD,Shi, ZT,Wu, F,Su, B,Feng, ZB,&Shi, Zhengtao.(2018).Seasonal and spatial variations of heavy metalsin surface sediments collected from the BaoxiangRiver in the Dianchi Watershed, China.Human and Ecological Risk Assessment: An InternationalJournal,24(7),1916-1929.
MLA Xiao, DD,et al."Seasonal and spatial variations of heavy metalsin surface sediments collected from the BaoxiangRiver in the Dianchi Watershed, China".Human and Ecological Risk Assessment: An InternationalJournal 24.7(2018):1916-1929.
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